git.iko.soy/crush
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crush/internal/diff/diff.go
29 lines 692 B history raw
1package diff
3import (
4 "strings"
6 "github.com/aymanbagabas/go-udiff"
7)
9// GenerateDiff creates a unified diff from two file contents
10func GenerateDiff(beforeContent, afterContent, fileName string) (string, int, int) {
11 fileName = strings.TrimPrefix(fileName, "/")
13 var (
14 unified = udiff.Unified("a/"+fileName, "b/"+fileName, beforeContent, afterContent)
15 additions = 0
16 removals = 0
17 )
19 lines := strings.SplitSeq(unified, "\n")
20 for line := range lines {
21 if strings.HasPrefix(line, "+") && !strings.HasPrefix(line, "+++") {
22 additions++
23 } else if strings.HasPrefix(line, "-") && !strings.HasPrefix(line, "---") {
24 removals++
25 }
26 }
28 return unified, additions, removals